There is a dropdown and two buttons: "Save Personal" and "Save Common" on the top left side of the settings dialog.
Save Personal button is for saving current configuration for current user.
Save Common saves common configuration for all users who uses Text Driver for the first time and have no saved configurations yet.
This button is mostly intended for administrators in multi-user environment (on a multi-user PCs or at Terminal servers).
You can choose different configuration in a dropdown and edit it.
How do you add a configuration? Please start a setup and follow these steps.
It will add a new virtual printer to your system. You can add as many printers as needed and set individual
settings for them.